Clamp for window locks



Jan. 5 1926.

A. T. GIBSON CLAMP FOR WINDOW LOCKS v Filed Julie 20. 1923 Patented Jan.5, 1926.

UNITED STATES ALEXANDER T. GIBSON, OF OAKLAND, CALIFORNIA.

CLAMP FOR WINDOW LOCKS.

Application filed June 20, 1923. Serial No. 646,670.

To all whom it may concern:

Be it known that I, ALEXANDER T. GIB- soN, a citizen of the UnitedStates, and a resident of Oakland, county of Alameda, State ofCalifornia, have invented a new and useful Clamp for Window Locks, ofwhich the following is a specification.

The present invention relates to improvements in window locks and hasparticular reference to a means for holding the two sashes of a windowin spaced relation so that the window may be opened for ventilatingpurposes without allowing a person to increase the opening for thepurpose of entering through the window. The device disclosed in thepresent application is an improvement on the window lock described in myco-pending application Serial No. 625,393, and the main improvementconsists in the construction of certain clamps used in the window lock.The principal advanta es of these clamps will appear as thespecification proceeds.

The preferred form of the invention is illustrated in the accompanyingdrawing in which Figure 1 shows a front view of my device as attached tothe two sashes of a window, Figure 2 a side view of the same as viewedfrom line 2-2 of Figure 1, Figure 3 a sectional detail view ofvtwocooperating elements of my clamp,'Figure 4 a cross-section taken alongline 44 of Figure 3, Figure 5 a detail view in front elevation of acombination handle and wrench, Figure 6 a vertical section through thesame taken along line 66 of Figure 5, Figure 7 a detail view of aportion of a handle forming part of the means for connecting the twoclamps and for handling the same in spaced relation and Figure 8 avertical section through the same. While I have shown only the preferredform of my invention I wish it to be understood that various changes andmodifications may be made within the scope of the claims hereto attachedwithout departing from the spirit of the invention. 7

My window lock consists in its principal features of two clamps (1) and(2) and the means (3) for holding the same in spaced relation. The twoclamps are preferably secured to the top members (4) and (6) of the twosashes (7) and (8) and their construction is shown in detail in Figures3 and 4. Each clamp comprises an internally threaded elongated member(9) hava lip (13) extending at right angles there: Y

from in registering relation to the lip (11). The engagement between theshoe and the saddle is such that the shoe is held against rotary motionon the saddle as shown in Figure 4 but may ride on the same, the lattermotion being limited only by the length of the engaging members and by asmall projection (4) on the saddle (9). The shoe has a perforation (16)which is aligned with the threaded perforation (17) in the saddlememberso that a bolt (18) may be introduced through the perforation (16) toengage the threads (17) and to force the two lips (11) and (13) upon theframe member (14) of the upper sash. It should be noted that the lipsare formed with slanting outer faces which prevents force from beingapplied from the outside for the purpose of removing the clamp and thatthe outer lip (11) is provided with an internal rib (19) adapted to diginto the yielding material of the window frame so as to prevent theclamp member (11) from being pushed upwardly by an intruder. The bolt(18) of the upper clamp may be rotated by means of a handle (21)constituting one link of the spacing means (3). The handle is formed asshown in Figures 7 and 8 to slip over the bolt and is recessed as shownat (22) to engage the head of the bolt so that when the handle isengaged with the head a simple revolving motion of the handle willtighten the bolt. For the lower clamping member I preferably use thehandle illustrated in Figures 5 and 6 comprising a hub (23) having aplurality of arms (24) extending therefrom in radial direction andprovided with the recess (26) adapted to engage the head (27 of the bolt(28) used for the lower clamp. Each arm is provided with the perforation(29). The connecting means (3) includes a plurality of links (31) ofdifferent lengths joined by means of couplings (32) and terminates in anend member (34) having an eye therein which may be made to register withany one of the perforations (29) in the arms (24) of the lower handle.The member (34) may be locked to the lower handle by a padlock (36) orany other suitable locking means. It will be readily seen that thisarrangement allows of a close adjustnient of the clamp since if thehandle shown in Figure 5 is used the latter may be locked at eachone-sixth of a turn.

The operation of the device will be readily understood from theforegoing description. First, the upper clamp (1) is secured to theupper frame member of the upper sash by means of the handle (21) whichlatter is adjusted upon the head of the bolt (18) in such a manner thatit assumes a vertical position when the clamp is tight on the framemember of the upper sash. Next, the clamp (2) is secured upon the upperframe member of the lower sash in a similar manner. Links (31) are addedby means of couplings (32) to produce a desired length of connectingmeans and the eye of the end member is brought in registry with one ofthe perforations (29) of the lower handle and locked to the latter bymeans of the padlock (3G) or whatever means is desired to be used forthis purpose. it is now impossible for anybody from the outside toincrease the opening of the window without breaking the lock or any ofthe other members of the locking device.

It is understood of course that the particular clamp described in thisspecification is not confined to be used with a window lock andprotection is sought on the clamp as such as an article of generaladaptation.

I claim:

1. A clamp of the character described, comprising an elongated seathaving a flat bottom, a lip extending from one end thereof at rightangles to the bottom, and being of uniform cross-section except for thelip and formed with an axial threaded bore, a

shoe adapted to ride on the seat and formed to completely encircle thetop and the sides thereof cross-sectionally, a lip extending from oneend of the shoe in juxtaposition to the lip of the shoe and a boltadapted to be guided through a perforation in the shoe into threadedengagement with the seat for tightening the lips upon an object.

A clamp of the character described, comprising an elongated seat havinga flatbottom, a lip extending from one end thereof at right angles tothe bottom, and being of uniform cross-section except for the lip andformed with an axial threaded bore, a shoe adapted to ride on the seatand formed to completely encircle the top and the sides thereofeross-sectionally, a lip extending from one end of the shoe injuxtaposition to the lip of the shoe, and a bolt adapted to be guidedthrough a perforation in the shoe into threaded engagement with the seatfor tightening the lips upon an object with a handle loose upon the bolthaving a recess therein adapted to fit on the inner edge of the bolthead for rotating thelatter.

3. A clamp of the character described, comprising an elongatedsaddle-shaped seat having a lip extending from one end thereof, a shoeadapted to ride on the seat having a lip extending from the opposite endthereof and a bolt passing through the shoe and threadedly engaging theseat for clamping the lips upon an object with a handle loose upon thebolt having a recess therein adapted to fit on the bolt head forrotating the latter, and having a plurality of radial arms allowing thehandle to be locked in any one of various positions.

ALEXANDER T. GIBSON.

